Nozzle construction



C. A. MATIRKO NOZZLE CONSI'RUCTION Filed Sept. 30, 1950 mwsmon 0/5;2-5/2 4 MA 7/2/40 JTTOQNEXT March 9, 1954 Patented Mar. 9, 1954 2 NOZZLECONSTRUCTION Chester a. Matirko, Tiiiln, om, assignor to BasicRefractories, Inc., Cleveland, Ohiofa corporation of Ohio ApplicationSeptember 30, 1950, Serial No. 187,729

8 Claims. l

Projecting cement material by air has been known for a long time, andvarious nozzle constructions have been used having provision to addwater. There is no particular difliculty with finely ground andslow-setting material. To admix water and project granular material,such as fumace-lining refractory compositions into place as for instanceon a wall, involves more particular and critical conditions. Suchcompositions may include coarse and flne particles in mixture, andinclude quick-plasticizing adhesive agents when water is added, andthere must be a thorough and uniform intermixing of water in such casesto give immediate development of adhesiveness in included plasticizingand setting agents if the material projected onto a furnace wall is tostick, or after having been applied is not to slump ofi in places. Inaccordance with the present invention a construction is had which makespossible the satisfactory applying of refractory compositions in thevarious exigencies of furnace lining and repairing conditions, cold orhot. Other objects and advantages of the invention will appear from thefollowing description.

To the accomplishment of the foregoing and related ends, the invention,then, comprises the features hereinafter fully described andparticularly pointed out in the claims, the following description andthe annexed drawing setting forth in detail certain illustrativeembodiments of the invention, these being indicative, however, of but afew of the various ways in which the principle of the invention may beemployed.

In said annexed drawing:

Fig. 1 is an end elevational view of the inlet end of a nozzleconstruction in accordance with the invention; and

Fig. 2 is a longitudinal sectional view taken on a plane substantiallyindicated by line 11-11, Fig. 1.

In general, the construction involves a body 1' or housing having anextension screw-threaded internally, and an inwardly directed flangewhich provides abutments. And enclosed within the housing is acylindrical ring having on its outer periphery a circumferential flangewhich coacts with the housing and provides a partition, to form twopassages, and provide a small clearance at the periphery of suchpartitioning flange for predetermined flow from the rear passage to theforward passage, inclined openings being arranged in the cylindricalring leading from the forward passage to the lumen of the nomle. And, atthe rear, the housing is closed and the cylindrical ring held by aclosure ring having a screw-threaded extension to receive the granularmaterial supply connection.

Thus, as shown in the drawing, the body or housing 2 has an extension 3internally threaded, and within the housing and spaced from its wall isthe cylindrical ring 4 which has on its outer periphery aflange I. Thisflange divides the annular space in the body into a rear passage A and aforward passage L. The outer periphery of the flange] is spaced from theinner periphery of the housing by a small clearance providingcommunication from passage A to passage L at the outer periphery.Preferably, a set of two or more interchangeable rings is used providingdifferent clearances, as for example 0.02", 0.03", etc., so that theoperator may apply the one most suitable for the particular material tobe projected. From the passage L a plurality of distributed openings 6generally 3 to 12 lead preferably at an incline in a forward directiontoward the axial center of the nozzle. The cylindrical ring 4 seats byits foreward edge against a gasket 8, and at its other or rear edge thecylindrical ringis against a gasket 9 which extends peripherally to alsoseal the housing by the closure-ring II which is held to the body by aplurality of cap screws II. The closure-ring it has an extension l2which is internally screwthreaded to receive the granular feed supplyconnection. An inlet I3 is provided for pressure-air and by a duct itthis communicates to the annular passage A which is formed between theclosure-ring II and the outwardly projecting flange 6 on the cylindricalring 4. At the outlet end is a projector pipe and while this may be aplain pipe of desired length screwed into outlet 3, with or without anadapter bushing, it is preferred to have a liner of rubber-likecharacter It, and this, in the form of a tube, has a cuff ll turned backoutwardly as supported by a metal sleeve It which has an integral ring20; and the assembled resilient liner and support tube may thus be setinto place in the extension 3. Then a screw-threaded bushing is screwedinto the extension holds the liner and tube in assembly. Thisconstruction is found to result in a smooth and correct fitting of thecuff without damage within the housing extension.

For introduction of liquid, water or chemical solution to promoteplasticizing or setting, liquid inlet 22, Fig. 1, is provided at a pointspaced from the air inlet [3. This spacing assures an emcientdistribution. The liquid inlet 22 communicates by an opening 23 to thepassage L. It is noticed that the air under high pressure leaves thepassage A in the form or a thin annular stream at the outer periphery ofthe flange 5, and is turned in by the outer wall of the passage to givea violent churning action with the liquid being supplied in passage L,the direction im- 3 posed by the initial jetting along the outer wall ofthe passage L causing an especially fine division or misting of theliquid before escaping through the openings L- A very finely divided andespecially uniform condition of the liquid and a uniform distributioninto the stream of granular material flowing through the lumen of thenozzle is found to result.

The manner of operation is understood from the foregoing. The granularcomposition supplied into the lumen of the nozzle through the extensionI! proceeds to the series of openings 6 where it is thoroughlyintermixed with the misted or very finely divided liquid as injectedthrough the openings 6.

Other modes of applying the principle of the invention may be employed,change being made as regards the detafls described, provided thefeatures stated in any of the following claims, or the equivalent ofsuch, be employed.

I therefore particularly point out and distinctly claim as my invention:

1. In a nozzle for projecting granular material, a housing with anoutlet extension which is internally threaded, a cylindrical ring havingan outwardly-directed flange on its periphery and seating within thehousing with the 'flange spaced by a small clearance from the innerperiphery of the housing, the flange separating rear and forward annularpassages, a plurality of holes through the ring from the forward passageangularly directed toward the center axis, an inlet for pressure-air tosaid rear passage, an inlet for liquid leading to the forward passage, agasket sealing the edge of said cylindrical ring against the housing, aring and holding means for closing against said cylindrical ring andhousing and having an internally threaded extension, a gasket betweenthe closure ring and the housing, a bushing to engage in the housingoutlet extension, a tubular rubber-like lining therewithin, a tubularmetal sleeve to support said lining externally and project within aback-turned cufl on the end of the lining adjacent the housing, and ametal ring secured to said sleeve between the edge of such cufl and saidbushing.

2. In a nozzle for projecting granular material, a housing with anoutlet extension which is internally threaded, a cylindrical ring havingan outwardly-directed flange on its periphery and seating within thehousing with the flange spaced by a small clearance from the innerperiphery of the housing, the flange separating rear and forward annularpassages, a plurality of holes through the ring from the forward passageangularly directed toward the center axis,

an inlet for pressure-air to said rear passage,-

an inlet for liquid to the forward passage, a gasket sealing the edge ofsaid cylindrical ring against the housing, a ring and holding means forclosing against said cylindrical ring and housing and having aninternally threaded extension, a gasket between the closure ring and thehousing, a rubber-like tubular liner, a bushing to engage in the housingextension and having a tubular portion to protect the rubber-like linerexternally and project within a backtumed cuif on the end of the liningadjacent the housing, and a metal ring between the edge of such cuif andsaid bushing.

3. In a nozzle for projecting granular material, a housing with anoutlet extension which is internally threaded, a cylindrical ring having4 mi outwardly-directed flange on an periphery and seating within thehousing with the flange spaced by a small clearance from the innerperiphery of the housing, the flange separating rear and forward annularpassages, a plurality of holes through the ring from the forward passageangularly directed toward the center axis, an inlet for pressure-air tosaid rear passage, an inlet for liquid to the forward passage, a gasketsealing one edge of said ring against the housing, a ring and holdingmeans for closins against said cylindrical ring and housing and havingan internally threaded extension, and a gasket between the closure ringand the nozzle and adjacent edge of the cylindrical ring.

4. In a nozzle for projecting granular materials, a housing with anoutlet extension which is internally threaded, a cylindrical ring havingan outwardly-directed flange on its periphery and seating within thehousing with the flange spaced by a small clearance from the innerperiphery of the housing, the flange separating rear and forward annularpassages, a plurality of holes through the ring from the forward passageangularly directed toward the center axis,

inlet connections for pressure-air and for liquid to the rear andforward passages respectively, a gasket sealing the edge of said ringagainst the housing, a ring and holding means for closing against saidcylindrical ring and housing and having an internally threadedextension, and a gasket between the closure ring and housing andadjacent edge of the cylindrical ring.

5. In a nozzle for projecting granular materials, a housing with anoutlet extension which is internally threaded, a cylindrical ring withcombined means for partitioning two annular passages within the wall ofthe housing and for providing discharge from the rear passage along theinside wall of the housing into the forward passage, said meanscomprising an outwardlydirected flange on the periphery of thecylindrical ring leaving a small clearance all around, holes through thering from the forward passage convergently toward the outlet, means forinlet of pressure-air and for liquid to the rear and forward passagesrespectively, and a closure ring for completing the rear passage andholding said cylindrical ring.

6. In a nozzle for projecting granular materials, a housing with inletand outlet in axial alignment, acylindrical ring within said housinghaving afiange on its periphery dividing off a forward annular passageand a rear annular passage but leaving a small clearance all around,means for inlet of gaseous pressure into said rear passage, means forinlet of liquid into said forward passage, and inclined openings fromthe forward passage convergently through said rin toward the outlet.

CHESTER A. MATIRKO.

References Cited in the file of this patent UNITED STATES PATENTS

